Fix thinko (PR tree-optimization/87201).

2018-09-03  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/87201
	* tree-switch-conversion.c (switch_decision_tree::balance_case_nodes):
	Fix parenthesis in an expression.

From-SVN: r264058

gcc/ChangeLog

+2018-09-03  Martin Liska  <mliska@suse.cz>
+
+	PR tree-optimization/87201
+	* tree-switch-conversion.c (switch_decision_tree::balance_case_nodes):
+	Fix parenthesis in an expression.
+
 2018-09-03  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/87197

gcc/tree-switch-conversion.c

@@ -1942,8 +1942,8 @@ switch_decision_tree::balance_case_nodes (case_tree_node **head,
 	      /* Skip nodes while their probability does not reach
 		 that amount.  */
 	      prob -= (*npp)->m_c->m_prob;
-	      if (prob.initialized_p ()
-		  && (prob < pivot_prob || ! (*npp)->m_right))
+	      if ((prob.initialized_p () && prob < pivot_prob)
+		  || ! (*npp)->m_right)
 		break;
 	      npp = &(*npp)->m_right;
 	    }